Envelop.



R. LANDENBBRGBR.

ENVELOP.

APPLIOA'I'ION FILED MAY 16. 1907.

Patented Nov. 30, 1909.

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RALPH LANDENBERGER, OF CHICAGO, ILLINOIS.

,ENVELOP.

Specification of Letters Patent.

Patented Nov. 30, 1909.

Application filed May 16, 1907. Serial No. 373,943.

lb all whom it may concern:

Be it known that I, RALPH LANDENBERGER, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Envelops, of which thefollowing is a specification.

My invention relates in general to station- 'ery, and more particularlyto envelops.

Commercial envelops are usually oblong and comprise symmetrical sideflaps and top and bottom flaps, the points of which overlap in a planeat the center of the envelop and at right angles to the top and bottomedges thereof. In cutting the blanks in the manufacture of such envelopsconsiderable of the stock is wasted owing to the spaces between theflaps.

The primary object of my invention is to provide an oblong envelop whichmay be made from an oblong blank without removing portions of the blankto form the flaps, thereby economizing in the consumption of the stockfrom which envelops are made.

A further object of my invention is to provide an oblong envelop, theoints of the side flaps of which will lie in di erent planes parallel tothe top and bottom edges of the envelop and the points of the top andbottom flaps of which will lie in different planes parallel to the sideedges of the envelop.

A further object of my invention is to provide an envelop which will besimple in construction, economical in manufacture and convenient in use.

The embodiment of my invention herein disclosed may be generallydescribed as consisting of an oblong envelop made from an oblong blankhaving notches cut in the longer edges thereof at unequal distances fromthe corners and notches cut in the shorter edges intermediate of thecorners, such notches serving to define the lines upon which the flapsare folded to form the-envelop, whereby the points of the side flapswill lie in different planes parallel to the top and bottom edges of theenvelop, while the points of the top and bottom flaps will lie indifferent planes parallel to the side edges of the envelop.

My invention will be more fully described hereinafter with reference tothe accompanying drawings in which the same is illustrated as embodiedin convenient and practical forms, and in which- Figure 1 is a plan viewof the blank; Fig.

2, an elevational view of the blank folded to form an envelop having oneof the longer flaps open to permit the insertion of the communication;and Fig. 3, an elevational view of the blank folded to form an envelophaving an end flap open to permit the insertion of a communication.

The same reference characters are used to designate the same parts inthe several figures of the drawings.

Reference character A indicates a blank formed of any suitable material,such, for instance, as paper stock. Notches a and at are cut in theshorter edges of the blank at points intermediate of the adjacentcorners, while reference characters a and a indicate notches cut in thelonger edges of the blank, such notches being nearer one pair ofdiagonally opposite corners than the other pair of diagonally oppositecorners.

In order to form the envelop the portions B and 13* of the blank arefolded inwardly along parallel lines 6 and 72* extending between therespective pairs of notches a and a and a and a The portions B and B ofthe blank are folded inwardly along the parallel lines I) and 6extending between the respective pairs of notches a and a and a and a.

The bottom flap B may be folded over and secured to the side flaps sothat the top flap B may be unattached to the other flaps to permit theinsertion of a communication after which it may be folded over andsecured to the portions of the side and bottom flaps which it overlaps.This form of envelop is shown in Fig. 2.

If desired, the top and bottom flaps may be folded inwardly and securedtogether, and one of the side flaps, as 13*, folded over and secured tothe adjacent portions of the top and bottom flaps, the other end flapbeing left open to permit the insertion of a communication after whichit is folded and secured to the adjacent portions of the top and bottomflaps.

It will be understood that the blank may be folded in any desired way toform an oblong envelop, and one of each of the overlapping portions ofthe envelop is provided with an adhesive to secure the overlappedportions of the flaps together. If desired, when the envelop 1s usedunsealed for second-class matter, one end flap, as for instance, B inFig. 2, will not be secured to the overlapping portion of the bottomflap B After the communication has been in serted in the envelop, thetop flap 18 then secured by moistening the adhesive thereon to theunderlying portions of the other flaps,

so that the contents will be securely inclosed without the envelop beingentirely sealed.

In manufacturing my improved envelop an oblong blank, such as shown inFig. 1, 1s first cut in any suitable manner, as by means of a largecutting machine such as used by printers and paper houses for cuttingpaper. The notches in the edges of the blank are then cut by anotheroperation.

WVhile my improved envelop is preferably manufactured by the processabove described, yet, if desired, it may be made with cutting dies inthe manner usual in the manufacture of envelops.

From the foregoing description it will be observed that I have inventedan improved envelop which by reason of'the shapes of its flaps may bemade from an oblong blank, thereby obviating the waste incident to themanufacture of oblong envelops heretofore constructed.

It is evident that my improved envelop involves practically no waste ofthe stock from which it is made, inasmuch as portions do not have to becut away in order to form flaps as must necessarily be done in themanufacture of oblong envelops comprising symmetrical side flaps and topand bottom flaps, the points of which overlap in the. same plane at thevertical center of the envelop.

Having now fully described my invention, what I claim as new and desireto secure by Letters Patent is A rectangular envelop comprising acontinuous side and a side consisting of four triangular flaps the apexof each of which is a right angle, the opposite flaps of each pair beingsymmetrical and the triangles of one pair being larger than those of theother pair, said envelop being formed from a rectangular sheet of paperhaving a notch in each of its edges, the bases of said notches lying atthe corners of an inscribed rectangle of the size of the completedenvelop, one of the diagonals of said rectangle being parallel to andmidway between two of the edges of said rectangular sheet.

RALPH LANDENBERGER. lVitnesses GEO. L. HLKINSON, ANNIE C. COURTENAY.

